“Douglas Barnes of permaculturereflections, who is a sustainable designer from the countryside in Tweed Ontario, has created a great tool that can be used to help with Swale implementation.
This calculator, located on his website here, addresses Swale spacing that has been a perennial question in Permaculture. This calculator turns the problem on its head and gives you the best estimate for spacing based on swale size.
WHY CALCULATE SPACING?
Installing swales costs time, energy, and money. Over-installation of swales is a waste of resources. Under-installation is a missed opportunity. If you want to have an optimal system, you’ll need to calculate spacing. The good news is that now it’s easy with our calculator!…”